Water-tube steam-boiler.



No. 728,996; I PATENTED MAY 26, 1903.

TH. SEE. WATER TUBE STEAM BOILER.

APPLIOATIOH FILED FEB. 8. 1902.

H0 MODEL. 2 SHEETS-SHEET L WITNESSES: INVENTOR .PATBNTED MAY 26', 1903.

H. SEE. WATER TUBE STEAM BOILER APPLIOATION FILED PHIL-9| 1902.

2 SHEETS-SHEET WITNESSES so. wnorouwc. WASNWOYON, n, c

UNITED STATES Patented May 26, 1903.

PATENT OFFICE.

WATER-TUBE STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 728,996, dated May 26,1903.

Application filed February 8. 1902. Serial No. 93,130. (No model.)

To all whom. it may concern.-

Be it known that I, HORACE SEE, of the city, county, and State of NewYork, have invented a new and useful Improvement in Water-TubeSteam-Boilers, of which the following is a specification.

My invention relates to a water-tube boiler; and it consists, first, inthe construction whereby the entire generating tube system is suspendedfrom the steam-drum by being attached thereto at the upper ends of thetubes; second, in the supporting of the waterpockets at the lower endsof said tubes; third, in the arrangement between and in rear of the twofurnaces of a mixing-chamber for the gases of both; fourth, in thecombination with said furnaces of the central group of tubes providedwith means for preventing. the gases passing between said tubes untilafter theylhave traversed said mixing-chamber; fifth, in theconstruction and arrangement of the subvertical side tubes, and, sixth,in the various combinations and instrumentalities more particularlypointed out in the claims.

In the accompanying drawings, Figure 1 shows on the left a partialvertical section taken in the direction of the arrow on the line 03 0cof Fig. 2 and on the right a partial vertical section on the line 0c 00of Fig; 2. Fig. 2 is a longitudinal section on the line y y of Fig. 1.Fig. 3 is a horizontal section on the line 2 z of Fig. 2. Fig. 4 is adetail View showing a modification in the arrangement of the subverticalside tubes. Fig. 5.is a section on the line a a of Fig. 4. Fig. 6 is adiagram showing the arrangement of three furnaces and two sets ofvertical tubes in accordance with my present invention.

and Sand provided with grate-bars 10. The suspended p0cket4 lies in thechamber formed between the center walls 8 and'9 and is disposed belowthe grate-bars, as shown. Because suspended from the steam-drum in themanner described the pocket 4 is free to move up and down, and thus thecontraction and expansion of its supporting-tubes are permitted. Inorder to maintain the alinement of the said tubes, the pocket4issupported upon links 11 and 12, (two on each side,) pivoted tobrackets on the center walls 8 and 9. Links on one side only of thepocket may be used, if desired.

At each side of the boiler is a double set of inclined generating-tubes,one set being shown on the left of Fig. 1, and the tubes beingrepresented-at 13 and 14. These tubes at their upper ends are connectedto the steam-drum 1' and at their lower ends they carry wing-pockets 15and 16, which pockets are connected to the outer walls by means of thelinks 17 and 18. The pockets 15 and 16 are thus suspended from thesteam-drum 1 by subvertical tubes which are free to expand and contractand which are kept in alinement by links 17 and 18.

From what has now been explained it will be apparent that the wholegenerating tube system of this boiler is supported from the steam drumand that the weight of the pockets is carried by the tubes. Inasmuch asthe pockets are free to move, the tube system by which they aresuspended is free to expand and contract, and its proper alinement ismaintained by the links 11 12 17 18.

Outside of the tubes 13 14 is the casingplate 19, which is secured atits upper end to the steam-drum, but which at the wing-pocket isprovided with a sliding joint 20. Hence the presence of this plate doesnot impede the expansion and contraction of the tubes 13 14. There is anintermediate plate 21, the function of which is to ward off the heatfrom the tubes 13 of the outer row, so that said tubes may become thedown-comer, while the inner row of tubes 14 form the up-comer. In thisway an efficient circulation of water in the tubes 13 and 14 is secured.of using this arrangement of tubes 13 and 14 I may employ thearrangement shown in Figs. 4 and 5, whereon the outer series of tubesare Instead brought into close contact to form the wall or partition.The plate 21 is then omitted, because the wall formed of the inner tubesserves to guard the outer tubes 13 from the heat. Consequently by thisarrangement the same result already explained, whereby the outer tubes13 form thedown-comer and the inner tubes 14 the up-comer, is secured.

Referring now to the center tubes 5, and particularly to Figs. 1 and 3,it will be observed that the second longitudinal row of tubes on eachside of the group are bent out- Wardly at their middle portions, so asto lie between the tubes of the outer row. Thus in said figures thetubes 22 of the second row are bent outwardly to fill the intervalsbetween tubes 23 of the first or outer row. The peripheries of the tubesbelonging to the rows 22 23 then come in close contact to formpartitions on each side of the group of tubes 5. These partitions extendfor a part of the distance from the front of the boiler to the rear, sothat in rear of the group of tubes 5 there is formed a chamber 24. Thischamber in Fig. 3 is shown containing a number of tubes 25. This,however, is not essential. In other words, the chamber may be entirelyempty of tubes or it may contain tubes with free spaces between them, asrepresented at 25 in Fig. 3.

The gases from the furnaces proceed rearwardly the boiler outside of thewalls formed by the tubes 22 23 of the inner group 5 until they reachthe mingling-chamber 24. Then they proceed in the opposite direction,but through the space between the tubes 5 to the smoke-box 26, and so tothe chimney. In this way the gases are held for a long time in contactwith the tubes, and their temperature at the point of exit iscorrespondingly reduced.

The steam is taken from the steam-drum by the pipe 27. Within the drum,secured to the outer portion thereof, is a curved baffie-plate 28, whichforms an inverted trough closed by a wire screen 29.- Steam condensingon theinner side of the steam-drum above the bathe-plate will fall onthe convex surface thereof, and so flow to the water below, while anywater which gets through the wire-netting will flow down off the loweredges of the baffle-plate.

In order to reduce the number of joints in the shell of the steam-drum,the feed-water pipe is introduced through the steam-pipe, as shown at30, and connects with the approximately horizontal pipe 31 inside thedrum. Pipe 31 admits water near the center line of the drum, and in thisway the downward movement of water through the tubes and to thewater-pocket 4 is assisted. The

casing 32 on the front of the boiler is provided with a hinged door 33,secured by a fastening-button 34, so that said door may be opened toobtain access to the tubes 5. There is also provided a door 35 forallowing access to the manhole in the end of the water-pocket 4, andthis manhole is closed by the usual cover and clamp 36. A manhole 37,also provided with a cover and clamp, is arranged in the rear of thedrum 1.

For the purpose of cleaning out the central chamber, in which thewater-pocket 4 is located, doors are provided in the walls 8 and 9, oneof which is shown at 38. Steam or compressed-air pipes, one of which isshown at 39, may also be led into said chamber for the purpose ofcleaning it out by jets of air or steam.

It is to be understood that I do not limit myself to a boiler of thiskind having the mingling-chamber 24 at the back and the smoke-box 26at'the front of the boiler, inasmuch as it is obviousthat the positionof these parts can be reversed. So, also, I may use more than twofurnaces. Thus in Fig. 6 I show two drums 1 1*, connected by horizontaltubes 40. From these drums are supported pockets 4 4* by the tubes 5 5*.From the drums 1 1* extend subvertical tubes to the wing-pockets 15 16.It is obvious that in this case there may be three furnaces, twolocated, respectively, on the outer sides of the wing-pockets and onedisposed between them. In Fig. 1 the door for affording access to thegrate is shown at 41 and the ashpit opening at 42.

I claim 1. In a water-tube boiler, a steam-drum, a plurality of groupsof generating-tubes depending therefrom, and a plurality ofwaterpockets, each pocket being wholly supported and freely suspendedfrom said drum by an associated group of tubes, substantially as described.

2. In a water-tube boiler, a steam-drum, a group of substantiallyvertical generatingtubes depending therefrom, a group of inclinedgenerating-tubes depending from said drum on each side of said verticalgroup, and water-pockets; each pocket being wholly supported and freelysuspended from said drum by an associated group of tubes, substantiallyas described.

3. Inawater-tubeboiler,asteam-drum,two groups of generating-tubesdepending therefrom, a water-pocket wholly supported and freelysuspended from said drum by each group of tubes, and a furnace disposedbetween said water-pockets, substantially as described.

4. Inawater-tubeboiler,asteam-drum,two groups of generating-tubesdepending therefrom, a water-pocket wholly supported and freelysuspended from said drum by each group of tubes and a furnace disposedbetween said water-pockets, one of said pockets being located entirelybelow the grate of said furnace, substantially as described.

5. In a water-tube boiler, a support, generating-tubes depending fromsaid support, a water-pocket wholly supported and freely suspended bysaid tubes and means for guiding said pocket in the line of longitudinalcontraction and expansion of said tubes during its movement due to saidcontraction and ex pansion, substantially as described.

6. The combination in a water-tube boiler, of a steam-drum, a pluralityof generatingtubes depending therefrom, Water-pocket carried at thelower end of said tubes, a fixed wall and a pivoted link connecting saidwater-pocket to said wall, substantially as described. f

7. The combination in a water-tube boiler of two furnaces, apassage'between said furnaces communicating at one end with both of saidfurnaces and at the other end with the uptake,and generating-tubesdisposed in said passage, substantially as described.

8. The combination in a water-tube boiler of two furnaces provided witha combustionchamber in rear of and common to both furnaces, a passagebetween said furnaces and communicating at one end with said chamber andat the other end with the uptake, and generating-tubes disposed in saidpassage, substantially as described.

9. The combination in a water-tube boiler of two furnaces provided witha combustionchamber in rear of and common to both furnaces, a passagebetween said furnaces and communicating at one end with said chamber,and at the other end with the uptake, and generating-tubes disposed insaid passage and in said chamber, substantially as described.

10. The combination in a water-tube boiler of two furnaces, a passagebetween said furnaces communicating at one end with both of saidfurnaces and at the other end with the uptake, and generating-tubesdisposed in said passage; the walls of said passage being formed byouter rows of said generatingtubes placed in close contact,substantially as described.

11. The combination in a water-tube boiler of two furnaces, a passagebetween said furnaces communicating at one end with both of saidfurnaces and at the other end with the uptake, a steam-drum above saidpassage,

and generating-tubes depending from said steam-drum and disposed in saidpassage, substantially as described.

12. The combination in a water-tube boiler of two furnaces, a passagebetween said furnaces communicating at one end with both of saidfurnaces and at the other end with the uptake, a steam-drum above saidpassage, generating-tubes depending from said steamdrum and disposed insaid passage, and inclined generating-tubes also depending from saiddrum and extending over said furnaces, substantially as described.

13. The combination in a water-tube boiler of two furnaces, a steam-drumabove them, two groups of inclined generating-tubes depending from saiddrum and extending respectively over said furnaces, a water-pocketwholly supported and freely suspended by each of said groups of tubes,two partitions extending downwardly from said drum and between saidfurnaces and rearwardly from the front wall of said furnaces but notreaching the rear wall, vertical generating-tubes depending from saiddrum and disposed in the space between said partitions, and awater-pocket between said furnaces wholly supported and freely suspendedby said vertical tubes, substantially as described.

14:. The combination in a water-tube boiler with the furnace, steam-drumand waterpocket 15, of the parallel rows of generatingtubes 13, 14,whereby said pocket is suspended from said drum, the inner row of saidtubes being placed in juxtaposition to form a wall, and the outer casing19 secured to said drum and provided with a sliding joint 20,substantially as described.

In testimony whereof I have signed my name tothis specification in thepresence of two subscribing witnesses.

' HORACE SEE.

Witnesses:

WILLIAM MOLLOY, HARRY A. MOSER.

